公开(公告)号：US09425726B2

公开(公告)日：2016-08-23

申请号：US14314484

申请日：2014-06-25

Applicant: Masdar Institute of Science and Technology

Inventor： Parag Kanjiya ,  Bharath Ambati ,  Vinod Khadkikar

IPC: H02P9/10 ,  H02H7/06

CPC classification number: H02P9/10 ,  H02H7/067

Abstract: This disclosure is directed to a fault-tolerant energy conversion system. A fault-tolerant doubly-fed induction generator (DFIG) for use with a wind energy conversion system (WECS) consistent with the present disclosure may allow for seamless operation during all kinds of grid faults. In one embodiment, a six-switch grid side converter (GSC) commonly used with such systems may be replaced with nine-switch converter circuitry. With three additional switches, the nine-switch converter can provide two independent three phase outputs. For example, one three-phase output may be coupled to the grid through interfacing inductors to realize normal GSC operation, while the other three-phase output may be coupled to neutral side of the stator windings to provide fault ride-through (FRT) capability to the DFIG. A control algorithm may be employed that both achieves seamless fault ride-through during any kind of grid faults and strictly satisfies grid codes requirements.

Abstract translation: 本公开涉及容错能量转换系统。 与本公开一致的用于风能转换系统（WECS）的容错双馈感应发电机（DFIG）可允许在各种电网故障期间的无缝操作。 在一个实施例中，与这种系统通常使用的六开关电网侧转换器（GSC）可以用九开关转换器电路代替。 使用三个附加开关，九开关转换器可以提供两个独立的三相输出。 例如，一个三相输出可以通过接口电感器耦合到电网，以实现正常的GSC操作，而另一个三相输出可以耦合到定子绕组的中性侧，以提供故障穿越（FRT）能力 到DFIG。 可以采用在任何种类的电网故障中实现无缝故障穿越的严格满足电网规则要求的控制算法。

公开(公告)号：US20150077067A1

公开(公告)日：2015-03-19

申请号：US14314484

申请日：2014-06-25

Applicant: Masdar Institute of Science and Technology

Inventor： Parag Kanjiya ,  Bharath Ambati ,  Vinod Khadkikar

IPC: H02P9/10 ,  H02H7/06

CPC classification number: H02P9/10 ,  H02H7/067

Abstract: This disclosure is directed to a fault-tolerant energy conversion system. A fault-tolerant doubly-fed induction generator (DFIG) for use with a wind energy conversion system (WECS) consistent with the present disclosure may allow for seamless operation during all kinds of grid faults. In one embodiment, a six-switch grid side converter (GSC) commonly used with such systems may be replaced with nine-switch converter circuitry. With three additional switches, the nine-switch converter can provide two independent three phase outputs. For example, one three-phase output may be coupled to the grid through interfacing inductors to realize normal GSC operation, while the other three-phase output may be coupled to neutral side of the stator windings to provide fault ride-through (FRT) capability to the DFIG. A control algorithm may be employed that both achieves seamless fault ride-through during any kind of grid faults and strictly satisfies grid codes requirements.

Abstract translation: 本公开涉及容错能量转换系统。 与本公开一致的用于风能转换系统（WECS）的容错双馈感应发电机（DFIG）可允许在各种电网故障期间的无缝操作。 在一个实施例中，与这种系统通常使用的六开关电网侧转换器（GSC）可以用九开关转换器电路代替。 使用三个附加开关，九开关转换器可以提供两个独立的三相输出。 例如，一个三相输出可以通过接口电感器耦合到电网，以实现正常的GSC操作，而另一个三相输出可以耦合到定子绕组的中性侧，以提供故障穿越（FRT）能力 到DFIG。 可以采用在任何种类的电网故障中实现无缝故障穿越的严格满足电网规范要求的控制算法。